embattled actress lindsay lohan confessed to the world she relapsed in her struggle with addiction. i did, in fact, fail my most recent drug test, she tweeted. perhaps in an attempt to beat the press by leaking her own gossip. this hip-hop star only needed 17 of 140 characters to say i'm sorry to singer taylor swift for his behavior at last year's video music awards. >> i'm really happy for you. i'm going to let you finish. but beyonce have one of the best videos of all time. >> reporter: no all celebs are on board. they closed their twitter accounts after negative attention. and john mayer, one of the most active on twitter just announced to his 3.7 million followers he is unplugging from the network as he heads back to the recording studio. while distracting for some twitter addictss crave -- of course instant updates on family and friends. so, if you are not already tweeting, it might be time to join the conversation. >> so, if you don't know how to twitter or tweet, as the case may be, katie will teach us houf. >> the best part about twitter it is so incredibly easy. if you thou